Shapes and Angles Test 2

Result

Shapes and Angles Test 2

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Question 1
1 / -0

Number of right angles formed in the given figure is:

A
$$5$$

B
$$3$$

C
$$2$$

D
$$4$$

Solution

There are four right angles in the figure which are $$ \angle PSR, \angle SRQ , \angle RQP , \angle QPS $$
Question 2
1 / -0

An angle which measures $$\displaystyle 90^{\circ}$$ is called

A
Obtuse angle

B
Acute angle

C
Right angle

D
None of these

Solution

An angle which measures $$ {90}^{o} $$ is called a right angle.
Question 3
1 / -0

Straight angle is ________

A
$$\displaystyle 90^{\circ}$$

B
$$\displaystyle 180^{\circ}$$

C
$$\displaystyle 60^{\circ}$$

D
$$\displaystyle 45^{\circ}$$

Solution

A straight angle $$ = {180}^{o} $$
Question 4
1 / -0

Based on the angle measures given, which triangle is not acute?

A
$$35^\circ,\, 69^\circ,\, 76^\circ$$

B
$$60^\circ,\, 60^\circ,\, 60^\circ$$

C
$$88^\circ,\, 46^\circ,\, 46^\circ$$

D
$$90^\circ,\, 45^\circ,\, 45^\circ$$

Solution

For acute angles triangle all the three angles must be less than $${ 90 }^{ \circ }$$.
In option $$D$$ one of the angle is $${ 90 }^{ \circ }$$ , so it is not acute angles triangle.
Question 5
1 / -0

Number of right angles formed in the given figure is:

A
$$5$$

B
$$3$$

C
$$2$$

D
$$4$$

Solution

There are two right angles in the figure which are $$ \angle PSR $$ and $$\angle QRS $$.
Question 6
1 / -0

An angle which measures more than $$\displaystyle 0^{\circ}$$ and less than $$\displaystyle 90^{\circ}$$ is called

A
obtuse

B
acute

C
right

D
none of these

Solution

Angles which measure more than $$ {0}^{o} $$ and less than $$ {90}^{o} $$ are acute angles.
Question 7
1 / -0

$$\displaystyle 91^{\circ}$$ is an example of

A
obtuse

B
acute

C
right

D
Reflex

Solution

An obtuse angle is one which is more than $$90^0$$ but less than $$180^0$$.
and hence $$\displaystyle 91^{\circ}$$ is an example of obtuse.
Question 8
1 / -0

Instrument used to measure or construct angles is

A
Compass

B
Scale

C
Protractor

D
Set Square

Solution

An instrument used to measure or construct angles is a protractor.
Question 9
1 / -0

Angles are measured in

A
compasses

B
protractor

C
degrees

D
centimetres

Solution

Angles are measured in degrees
Question 10
1 / -0

An angle which is more than $$180^{\circ}$$ and less than $$360^{\circ}$$ is called:

A
obtuse angle

B
right angle

C
reflex angle

D
complete angle

Solution

By definition, we know, an angle which is more than $$180^o$$ and less than $$360^o$$ is called reflex angle.
That is, an angle larger than a straight angle but less than $$1$$ turn (between $$180^o$$ and $$360^o$$) are called reflex angle.
Therefore, option $$C$$ is correct.